Breaking down the 2012 OL class

Top O-linemen have a combination of size, athleticism and toughness

When evaluating offensive linemen, it is important to consider all aspects of their games -- pass protection, run-blocking, awareness and toughness.

Here's how we rank all draftable offensive linemen heading into the 2012 NFL combine by skill set (non-seniors noted with an asterisk). We also break down four-year measurement and timing trends, market trends at the position and 2011 Day 1 picks from the offensive line.

Pass protection

An offensive lineman needs good instincts to anticipate double-moves, twists, stunts and blitzes and needs quick feet to get set in time. He has balance and body control to mirror and slide. He has lateral movement to shuffle back inside; long arms to keep separation and force pass-rushers wide; and a powerful punch to jar defenders and ruin their momentum.